Andromeda went on sale pretty soon after release and currently goes down to about $20-30 USD. Here are some threads discussing this topic, but most users will say that the game is worth getting at the discounted price.

Do I need to play the OT before playing Andromeda?

Technically, no. However, it is generally highly recommended you do so, as playing the OT will greatly enhance your understanding of MEA.

Mass Effect 2 was a perfect game. Beautiful graphics, gameplay and story. A total improvement on the original and I couldn't keep myself away from it.

Why then does ME3 disinterest me? It's not better, it's just different. The sharp shiny graphics of ME2 is gone, replaced with a blandness that feels like it's out of focus.

Gameplay? A very slight improvement, but I don't care about the game play, I play Mass Effect for the story.

And I find myself not caring about the storyline either.
I'm in a war zone on a moon, there are gigantic reapers in the distance. SNOOZE. I just don't care. The frightful image of reapers coming back to wreak havoc was terrifying and incredibly interesting, now they're here it's just boring.

Tell me /r/masseffect , am I wrong? Should I keep going? Or does the game continue to be like this until the end?

basically if you care about the quarians/geth you should continue past Tuchunka (I think it's the mission after anyway) since it doesn't really have reapers in it either apart from one boss battle (and it's more about the history of the geth/quarian war) after that though I think it all starts turning back towards earth (well there's a stint on the Asari homeworld but that's fairly interconnected with reapers and why the Asari are more advanced the other races but it's about as Reaper related as the turian moon mission you're not finding interesting).

Citadel DLC isn't really connected to the ME3 story, it has a lot more humor in it and jokes directed at itself, it's more there if you want to have funny/awkward coversations with all the team mates over the 3 games and have a fun little side mission. It's really just about the interactions between all the crew you've had over the series so if you want to dig further into that it's worth checking out but it's not essential.

If you care about the characters in the story (and I find it hard to believe that after two games, anyone could NOT care about them), finish the game. And make sure, no matter what, that you have and play thru the Citadel DLC. The other DLCs are good, and I recommend them too, but the Citadel DLC is a must play.

Trust me, you'll be happy you did (sorta, it's REALLY bittersweet, but in a good way).

I just find it hard to see where you're coming from. ME3, to me, clearly has better graphics. But graphics are whatever.

Did you play ME1? After both of those games, you've built an investment in the characters. You've been trying to prep for the Reapers, but you know it's not enough. There's a huge build up. And then it hits. The nightmare you've been preparing for.

Earth is instantly overwhelmed. You flee Vancouver as the defenses are effortlessly overrun. You know that there can be no victory, there's just not enough military forces in the galaxy.

Then Mars. You're reunited with Liara, and given hope. What is this device? I don't know, the Reapers don't know, but it might be a chance. A slim chance, but that's more than you had a minute ago. It's a long shot, but it would always be a long shot against the Reapers. Now you just need to convince the Council to dedicate resources to this.

Ah, the Council. Never your biggest fans. As usual, they're cautious with everything you say. But, in the unlikeliest turn of all, the Turian Councillor extends a hand. Just come help of Palaven.

Ah, Palaven. Garrus's homeworld. Well, the moon perhaps. A moon fraught with symbolism all the way back to the Krogan Rebellions. The homeworld of the mightiest military in the galaxy. With the bulk of the Reaper forces at earth, the Turians just might have a chance.

And then you see it. Palaven is on fire. The Reapers aren't even using tactics. They're smashing straight through everything, superior in numbers and technology. The Reapers themselves are on the moon, slaughtering the opposition. Isn't this hopeless? How can you triumph against such a foe?

But there's still the Catalyst. For the first cycle in the last 100 million years, there's a chance. It will take cooperation on a previously unimaginable scale. Old foes will have to unite. New alliances will be forged. Even if this can be accomplished, there will be hardship. Sacrifice. Loss. But you don't shirk from this. You're Commander Shepard, and you were born for this conflict. The galaxy needs a miracle like it never has before, and you are ready to answer the call.

Billions of lives are counting on you. The most advanced army in existence opposes you.

Are you ready for the challenge?

That's where I was. If you don't feel anything yet, maybe you won't. But I thought it was a hell of a journey. Maybe it's worth a shot.

Mass Effect 2 was actually hard for me to sit through in terms of gameplay. I was so close to getting rid of the game without even finishing it a couple times. At the time, coming from Mass Effect 1, I hated how they removed the exploration aspect of it, simplified the RPG elements (basically turning it into JUST a 3rd person shooter), and that EA got their hands in the mix.

I honestly think u should Definitely play through the 3rd one. It kinda sounds like you're speculating as to how you think the game is gonna carry out.

ME3 was done well in the sense that it really has a sense of urgency given the situation with the reaper attack on the galaxy, and you also really get a sense of all the trials Shepard has to deal with throughout the game, in order to put everyone into a better position to stop the attack. Like Protoavis stated earlier, u should at least finish the Tuchunka mission. That's where the story REALLY picks up, and takes off from there. It's AMAZING!

Yea if you really love the story and care about all the storylines from the first two games you have to finish. At the very least play till the end do te citadel DLC and call it a day. You won't regret it.